I filled my 58 up with gas I had for the hurricane season here in Florida. I got a little to generous and the tank overflowed. I siphoned out enough to keep it from coming out the filler cap. I then got in the car and turned it on to check the gauge. The gauge showed the tank to be about a 1/16 from being full. I drove around a bit and saw some fuel around the cap were it must has sloshed out during my ride. I thought maybe I had an air pocket in the tank from my filling with the gas cans. However. the gauge still showed the tank to be below empty. Any way to check the gauge or the sending unit to see what is going on?

Thanks Wah2oo